That is for sure a very difficult shot to cleanup. Not impossible, but I would think you would really struggle to get accurate results for the entire shot with the Mocha Remove module alone.
You may be able to get more help from other users on here with using the Remove Module for sections of this but I’ll briefly try to explain how I would approach a big paint shot like this.
First thing I would ask is do you have a cleanplate as that would save having to manually paint the BG and pull from different frames to rebuild all the different sections. You’d also probably want to stabilize the camera, a full 3D camera would be ideal with tracked geo available to use for projecting onto the road etc. Shots like this are 200% harder & longer without a tracked camera.
If none of this is available then first I would ask are they paying you enough! If they are then you are going to need to first track the shot yourself & then separate everything into layers and essentially rebuild everything separately. Separating all the trees & foliage is a tricky task, a fair bit of roto will be required but soft fractal blurs & warps to ‘fake’ parralax can also be a very handy trick in this situation.
The road is also pretty difficult to rebuild due to the amount of backwards movement in depth. The traditional way would be to make one huge patch from lots of different frames probably in some form of UV projection onto geo. You could have a look at Mocha’s new Mega Plates feature which essentially aims to achieve the same thing of creating one huge patch from data across the entire frame range, it most probably won’t get you there straight away but it might be very good starting point.
Cleanup shots like this also depend on what is supposed to be happening on this shot. Is there going to be a CG explosion where a large majority of the plate is covered in smoke and dust? Or is the shot going to be completely empty with nothing but the background? That will really affect how much detail your cleanup work needs to be.
Sorry this post is still quite brief but hopefully some of it helps understand what you might need to do here. I’d be happy to help further if needed.